OLED light-emitting panel

Abstract

The invention provides an OLED light-emitting panel, and the panel comprises an upper substrate which is used for displaying light; the lower substrate is arranged opposite to the upper substrate; the light-emitting assemblies are arranged between the upper substrate and the lower substrate and used for emitting light to the periphery; the light bunching groove is formed between the light-emitting assembly and the lower substrate, and the light bunching groove is used for reflecting light rays emitted by the light-emitting assembly and reflecting the light rays, not emitted towards the upper substrate, of the light-emitting assembly to be emitted towards the upper substrate.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted display panel structures, and in particular to an OLED light-emitting panel. Background Art

[0002] With the development of science and technology and the improvement of living standards, cars have also added more and more display or audio-visual entertainment functions. These functions usually require the use of display panels, especially OLED light-emitting panels. OLED is a current-type organic light-emitting device that emits light through the injection and recombination of carriers. The luminous intensity is proportional to the injected current.

[0003] When display panels (especially OLED display materials) are used, they will face material attenuation problems due to the use of organic self-luminescence, which will lead to a decrease in luminous intensity, which in turn will reduce the brightness of the entire display panel and shorten its service life. This phenomenon may be more prominent when the display is used in a car, mainly because the in-car environment is more complex. When used in a car, the display brightness is sometimes increased to counteract the interference of ambient natural light, which poses a higher challenge to the achievable brightness of the display.

[0004] In the prior art, the OLED light-emitting panel has only one display surface, and the other non-display surfaces are all provided with shading materials to prevent light leakage. The common operation to increase the brightness is to increase the current intensity, which will increase the loss of the light-emitting material. Long-term exposure to such high-voltage environment will inevitably affect the service life of the OLED light-emitting panel. And because the OLED light-emitting panel is composed of R (red), G (green), B

[0005] (blue) three basic colors. When reflecting light, you need to pay attention to avoid light interference between different colors, which will affect the normal display of the panel color. Summary of the invention

[0006] The purpose of the present invention is to provide an OLED light-emitting panel, aiming to solve the shortcomings of the above-mentioned background technology. The light originally absorbed by the shading material is reflected to the display surface through the light beam groove. When the luminous efficiency of the luminous material remains unchanged, the brightness can be increased by using the light beam groove to reflect the light. At the same time, each light-emitting component is correspondingly arranged with a light beam groove to individually reflect the light emitted by each light-emitting component.

[0007] The present invention provides an OLED light-emitting panel, comprising: an upper substrate, used for displaying light; a lower substrate, arranged opposite to the upper substrate; a plurality of light-emitting components, arranged between the upper substrate and the lower substrate, used for emitting light to all directions; a light beam groove, arranged between the light-emitting components and the lower substrate, the light beam groove being used for reflecting the light emitted by the light-emitting components, and reflecting all the light that is not emitted by the light-emitting components toward the upper substrate to be emitted toward the upper substrate.

[0008] In one embodiment of the present invention, the light beam groove includes a bottom plate and a side plate connected to the circumference of the bottom plate and extending toward the upper substrate, and the surfaces of the bottom plate and the side plate facing the light emitting component are reflective surfaces.

[0009] In one embodiment of the present invention, a reflective layer is evaporated or adsorbed on a surface of the light beam groove facing the light emitting component.

[0010] In one embodiment of the present invention, the reflective layer is a silver film or an aluminum film.

[0011] In one embodiment of the present invention, the reflective layer is a polyethylene terephthalate (PET) composite film layer, a polyvinyl chloride (PVC) composite film layer, or a polymethyl methacrylate (PMMA) composite film layer.

[0012] In one embodiment of the present invention, the side panels are arranged at both ends of the bottom panel, and the side panels are connected to the bottom panel in a broken line shape.

[0013] In one embodiment of the present invention, the light-emitting component includes a cathode, an anode and a light-emitting module, the cathode is arranged on a side close to the upper substrate, the anode is arranged opposite to the cathode, the light-emitting module is arranged between the cathode and the anode, and the light-emitting module is used to emit light to the surroundings.

[0014] In one embodiment of the present invention, the light beam groove is disposed between the light emitting module and the anode.

[0015] In one embodiment of the present invention, along a direction perpendicular to the upper substrate, the upper surface of the side panel is closer to the upper substrate than the upper surface of the light emitting module, or the distance between the upper surface of the side panel and the upper substrate is equal to the distance between the upper surface of the light emitting module and the upper substrate.

[0016] In one embodiment of the present invention, the light beam groove includes a bottom plate, which is arranged between the light-emitting component and the lower substrate. The bottom plate has a side facing the light-emitting component provided with a reflective material for reflecting light emitted by the light-emitting component toward the lower substrate.

[0017] The beneficial effects produced by the present invention compared with the prior art are as follows: in the OLED light-emitting panel of the present invention, a beam groove is added, and the beam groove has a reflective effect. The beam groove is arranged in the OLED light-emitting panel, and the light that would otherwise be absorbed and rendered invalid is reflected toward the light-emitting side by the beam groove, so that all light is effectively utilized; at the same brightness, the current intensity in the OLED light-emitting panel using the beam groove is less than the current intensity in the OLED light-emitting panel not using the beam groove, thereby extending the service life of the light-emitting material; and each light-emitting component is correspondingly arranged with a beam groove for independent reflection without mutual interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 4 is a cross-sectional view of an OLED light-emitting panel in a first embodiment of the present invention.

[0019] Figure 2 for Figure 1 A cross-sectional view of the light beam groove in the OLED light-emitting panel shown.

[0020] Figure 3 for Figure 1 A cross-sectional view of the light-emitting components in the OLED light-emitting panel shown.

[0021] Figure 4 FIG. 4 is a cross-sectional view of an OLED light-emitting panel according to a second embodiment of the present invention.

[0022] Figure 5 FIG. 4 is a cross-sectional view of an OLED light-emitting panel in a third embodiment of the present invention. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0025] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in the present invention.

[0026] The present invention provides an OLED light-emitting panel, comprising: an upper substrate 1, used for displaying light; a lower substrate 2, arranged opposite to the upper substrate 1; a plurality of light-emitting components 3, arranged between the upper substrate 1 and the lower substrate 2, used for emitting light to all directions; a light beam groove 4, arranged between the light-emitting component 3 and the lower substrate 2, the side of the light beam groove 4 close to the upper substrate 1 being an open end, the light-emitting component 3 being arranged at the open end of the light beam groove 4, the light beam groove 4 being used for reflecting the light emitted by the light-emitting component 3, and reflecting all the light that is not emitted toward the upper substrate 1 by the light-emitting component 3 to be emitted toward the upper substrate 1.

[0027] like Figure 1As shown, an OLED light-emitting panel includes the most basic upper substrate 1, lower substrate 2 and light-emitting component 3. The upper substrate 1 and the lower substrate 2 are preferably rectangular flat plates, and materials with high light transmittance are selected. The upper substrate 1 and the lower substrate 2 are aligned with each other and arranged in parallel. A black matrix 5 is also arranged between the upper substrate 1 and the lower substrate 2, and supported by the black matrix 5. The upper substrate 1 is mainly used to display light, and the lower substrate 2 is mainly used to receive the light-emitting component 3.

[0028] Most displays use the RGB color standard, that is, based on the three colors of R (red), G (green), and B (blue), and obtain a variety of colors by changing the three color channels and superimposing them on each other. Therefore, the black matrix 5 arranged between the upper substrate 1 and the lower substrate 2 is grouped in four. The four black matrices 5 are spaced and arranged symmetrically to separate three independent spaces without interfering with each other.

[0029] The light-emitting components 3 of three colors, R (red), G (green), and B (blue), are arranged in three independent spaces respectively, and are arranged from left to right in the order of R (red), G (green), and B (blue). Three light-emitting components 3 of different colors form a group, and multiple groups of light-emitting components 3 are arranged in sequence in the display. The light-emitting components 3 are arranged in independent spaces, and only the side facing the upper substrate 1 is the light-emitting side, and the rest are non-light-emitting sides. After the light-emitting components 3 are powered on, they continuously emit light to the surroundings, but only the light emitted toward the upper substrate 1 is effective light and can be used.

[0030] The black matrix 5 is arranged between the upper substrate 1 and the lower substrate 2 to play a supporting role, and needs to have sufficient structural strength. At the same time, in order to prevent mutual interference between the light-emitting components 3, the black matrix 5 also needs to be made of insulating material.

[0031] In this embodiment, a beam groove 4 is further added between the light emitting component 3 and the lower substrate 2. The beam groove 4 is preferably in a zigzag shape with one end open and the other end closed, the open end facing the upper substrate 1, and the closed end arranged on the lower substrate 2. The zigzag beam groove 4 has a bottom surface and a side surface, and the inner surface surrounded by the bottom surface and the side surface has a reflective effect, and the bottom surface of the beam groove 4 is arranged parallel to the lower substrate 2. The light emitting component 3 is arranged at the open end of the beam groove 4, and can be completely arranged in the beam groove 4, or partially arranged in the beam groove 4.

[0032] When the light-emitting component 3 is powered on and emits light, the light-emitting component 3 emits light in all directions. Since a light beam groove 4 is arranged between the light-emitting component 3 and the lower substrate 2, the light emitted by the light-emitting component 3 toward the lower substrate 2 and perpendicular to the lower substrate 2 will be completely reflected by the bottom surface of the light beam groove 4, and finally emitted toward the upper substrate 1 and perpendicular to the upper substrate 1. The light emitted by the light-emitting component 3 toward both sides is reflected by the side of the light beam groove 4 and also emitted from the upper substrate 1.

[0033] In the present invention, through the reflection effect of the beam groove 4, the light originally emitted toward the lower substrate 2 and perpendicular to the lower substrate 2 is emitted toward the upper substrate 1, and the light originally emitted toward the two sides is also emitted toward the upper substrate 1. Thus, the light on the non-light-emitting side is reflected to the light-emitting side through the beam groove 4, thereby improving the utilization rate of the light-emitting component 3; and without increasing the current intensity, the brightness is increased, thereby extending the service life of the light-emitting component 3.

[0034] At the same time, because the black matrix 5 separates a plurality of independent spaces between the upper substrate 1 and the lower substrate 2, each independent space is provided with a light emitting component 3 for independent light emission. Correspondingly, each independent space is also provided with a light beam groove 4, and each light beam groove 4 reflects light of one color, thereby avoiding interference caused by emitting light of different colors.

[0035] In one embodiment, the light beam groove 4 includes a bottom plate 41 and side plates 42 connected to the periphery of the bottom plate 41 and extending toward the upper substrate 1 . The surfaces of the bottom plate 41 and the side plates 42 facing the light emitting component 3 are reflective surfaces.

[0036] like Figure 2 As shown, in this embodiment, the beam slot 4 preferably includes a bottom plate 41 and two side plates 42. The two side plates 42 are arranged at intervals and symmetrically to form a shape with openings at the top and bottom. The two ends of the bottom plate 41 are respectively fixedly connected to the lower ends of the two side plates 42 to form closed ends. The inner surface enclosed by the bottom plate 41 and the side plates 42 is provided with a reflective layer, which has a reflective effect.

[0037] Preferably, in this embodiment, the spacing between the upper ends of the two side panels 42 is greater than the spacing between the lower ends of the two side panels 42, that is, the two side panels 42 are inclined to both sides to form a beam groove 4 that is wide at the top and narrow at the bottom. First, the two side panels 42 are inclined to both sides to avoid interference with the light reflected by the bottom plate 41. Secondly, it is also possible to make the light emitted by the light-emitting component 3 to both sides be emitted toward the upper substrate 1 after only one reflection. According to the prior art, no matter what kind of reflective layer is used, it is impossible to achieve 100% light reflection. On the one hand, the constituent material of the actual mirror (such as SiO) will inevitably absorb the incident light, and at the same time, the mirror surface cannot be absolutely smooth and flat, which will cause scattering (diffuse reflection) in all directions, resulting in the loss of incident light energy. On the other hand, even if the absorption and scattering processes are ignored, the electromagnetic wave irradiated on the mirror will also undergo two processes of transmission and reflection, making the reflectivity less than 100%. Therefore, each reflection will cause energy loss of light. In order to increase the light intensity, the number of light reflections should be reduced as much as possible.

[0038] In one embodiment, a reflective layer is evaporated or adsorbed on the surface of the light beam groove 4 facing the light emitting component 3 .

[0039] Please refer to Figure 2The inner surface of the beam groove 4 needs to be processed with a reflective layer so that the inner surface of the beam groove 4 has a reflective effect, and the processing technology mainly includes evaporation or adsorption.

[0040] The evaporation process refers to a process in which the reflective material is first evaporated and gasified by heating and evaporation in a vacuum environment, and then the particles fly to the surface of the substrate and condense into a film. The advantages of the evaporation process are high purity and density of the film, and unique film structure and performance.

[0041] The adsorption process is usually carried out in a vacuum environment. The luminescent material used to make the luminescent layer is placed in a vacuum tube together with the substrate. Since the luminescent material is an ultra-thin film layer, the luminescent material is directly adsorbed on the substrate through the vacuum negative pressure. The advantages of the adsorption process are simple operation and high production efficiency.

[0042] In one embodiment, the reflective layer is a silver film or an aluminum film.

[0043] Specifically, the reflective layer material of the inner surface of the beam groove 4 can be a metal film layer such as silver or aluminum, and the processing technology corresponding to the metal film layer is evaporation. Because the metal film layer such as silver or aluminum can be vaporized by heating and evaporation, the metal film layer generally has a higher reflective efficiency when the evaporation process is used for processing.

[0044] In one embodiment, the reflective layer is a polyethylene terephthalate (PET) composite film layer, a polyvinyl chloride (PVC) composite film layer, or a polymethyl methacrylate (PMMA) composite film layer.

[0045] Specifically, the reflective layer material of the inner surface of the beam groove 4 can be selected from polyethylene terephthalate PET composite film layer, polyvinyl chloride PVC composite film layer or polymethyl methacrylate PMMA composite film layer. When this type of composite film layer is selected, the corresponding processing technology is adsorption, because the composite film layer is usually a polymer compound and the film layer is ultra-thin. Therefore, the processing technology used is adsorption, and the composite film layer is quickly formed through the adsorption process, and the production efficiency is high.

[0046] In one embodiment, the side panels 42 are arranged at both ends of the bottom panel 41 , and the side panels 42 and the bottom panel 41 are connected to form a broken line.

[0047] like Figure 2In the light beam groove 4 shown, the two ends of the bottom plate 41 are symmetrically arranged with side plates 42, and the side plates 42 are used to reflect the light emitted by the light emitting component 3 to both sides, while the bottom plate 41 reflects the light emitted by the light emitting component 3 toward the lower substrate 2. Although the bottom plate 41 is mainly used for reflection, the two symmetrically arranged side plates 42 also reflect the light on both sides, further improving the luminous efficiency. At the same time, the light beam groove 4 uses a glass substrate during the manufacturing process, and such a folded line shape will be formed first during the processing. Therefore, the folded line-shaped light beam groove 4 can also make processing more convenient.

[0048] In one embodiment, the light-emitting component 3 includes a cathode 31, an anode 32 and a light-emitting module 33. The cathode 31 is arranged on a side close to the upper substrate 1, the anode 32 is arranged opposite to the cathode 31, and the light-emitting module 33 is arranged between the cathode 31 and the anode 32. The light-emitting module 33 is used to emit light to the surroundings.

[0049] like Figure 3 As shown, a light-emitting component 3 includes a cathode 31, an anode 32 and a light-emitting module 33. Every three light-emitting components 3 form a group, and the corresponding light-emitting modules 33 are also divided into three colors: R (red), G (green), and B (blue), and are arranged in independent spaces without interfering with each other. The anode 32 and the cathode 31 are arranged opposite to each other, and the cathode 31 is arranged on the side close to the upper substrate 1. The function of the anode 32 and the cathode 31 is to generate current, and then the generated current passes through the light-emitting module 33, so that the light-emitting module 33 emits light of the corresponding color.

[0050] However, each color of the light emitting module 33 is arranged in an independent space and does not interfere with each other. The anode 32 is arranged below the light emitting module 33 and is arranged in an independent space like the light emitting module 33. Therefore, an anode 32 is arranged below each light emitting module 33. In this embodiment, it is only necessary to separate the light emitting modules 33. Therefore, the cathode 31 arranged above the anode 32 is not affected and does not need to be divided into multiple ones.

[0051] In this embodiment, three anodes 32 and three light-emitting modules 33 are provided, and three form a group. However, only one cathode 31 is required to cover all anodes 32 to ensure that each light-emitting module 33 can be powered on and emit light.

[0052] In one embodiment, the light beam groove 4 is disposed between the light emitting module 33 and the anode 32 .

[0053] like Figure 4As shown, the beam groove 4 can also be arranged between the light emitting module 33 and the anode 32. Because only the light emitting module 33 emits light, it is only necessary to ensure that the beam groove 4 can reflect the light emitted by the light emitting module 33. The beam groove 4 is arranged between the light emitting module 33 and the anode 32, so that the distance between the beam groove 4 and the light emitting module 33 is closer, thereby reducing the energy loss of the light during the propagation process and improving the light intensity. The opening end faces the cathode 31 in order to reflect the light emitted by the light emitting component 3 toward both sides toward the upper substrate 1.

[0054] In one embodiment, along a direction perpendicular to the upper substrate 1 , the upper surface of the side panel 42 is closer to the upper substrate 1 than the upper surface of the light emitting module 33 , or the distance between the upper surface of the side panel 42 and the upper substrate 1 is equal to the distance between the upper surface of the light emitting module 33 and the upper substrate 1 .

[0055] In this embodiment, the distance between the upper surface of the side plate 42 and the upper substrate 1 is equal to the distance between the upper surface of the light emitting module 33 and the upper substrate 1. Figure 4 As shown, the upper surface of the side plate 42 and the upper surface of the light emitting module 33 are arranged adjacent to the upper substrate 1. Such an arrangement can ensure that all the light emitted by the light emitting module 33 is reflected by the light beam groove 4, so as to maximize the efficiency of the light emitting module 33. Similarly, the solution that the upper surface of the side plate 42 is closer to the upper substrate 1 than the upper surface of the light emitting module 33, that is, the light emitting module 33 is completely arranged inside the light beam groove 4, is also to ensure that all the light emitted by the light emitting module 33 is reflected by the light beam groove 4.

[0056] In one embodiment, the light beam groove 4 includes a bottom plate 41 disposed between the light emitting component 3 and the lower substrate 2 . A reflective material is disposed on a side of the bottom plate 41 facing the light emitting component 3 for reflecting light emitted by the light emitting component 3 toward the lower substrate 2 .

[0057] like Figure 5 As shown, the light beam groove 4 only needs to include a bottom plate 41. Of course, the bottom plate 41 is also used to reflect the light emitted by the light emitting component 3, so at least one side of the bottom plate 41 facing the light emitting component 3 needs to be provided with a reflective material to reflect the light originally emitted by the light emitting component 3 toward the lower substrate 2 and perpendicular to the lower substrate 2 and then emit it toward the upper substrate 1.

[0058] Since the general light-emitting component 3 generates light in the light-emitting module 33 through the current generated by the cathode 31 and the anode 32, the light-emitting module 33 also mainly emits light in two directions, namely, the up and down directions in this case. Because the light-emitting component 3 mainly emits light in the up and down directions and emits less light to the sides, a bottom plate 41 is used in this embodiment to reflect the light emitted downward by the light-emitting module 33.

[0059] The bottom plate 41 needs to reflect the light emitted downward by the light emitting module 33, and also needs to be arranged below the light emitting module 33. As described above, the bottom plate 41 can be arranged between the anode 32 and the light emitting module 33, or between the anode 32 and the lower substrate 2. Figure 5 As shown, in this embodiment, the bottom plate 41 is arranged between the anode 32 and the lower substrate 2. The solution of using only one bottom plate 41 can save materials, and at the same time, most of the light is reflected, thereby improving the light intensity on the light output side.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An OLED light-emitting panel, characterized in that: include: An upper substrate (1) for displaying light; A lower substrate (2) arranged opposite to the upper substrate (1); A plurality of light-emitting components (3) are arranged between the upper substrate (1) and the lower substrate (2) and are used to emit light in all directions; A light beam groove (4) is provided between the light emitting component (3) and the lower substrate (2), and the light beam groove (4) is used to reflect the light emitted by the light emitting component (3), and to reflect all the light that is not emitted by the light emitting component (3) toward the upper substrate (1) to be emitted toward the upper substrate (1).

2. The OLED light-emitting panel according to claim 1, characterized in that: The light beam groove (4) comprises a bottom plate (41) and a side plate (42) connected to the peripheral side of the bottom plate (41) and extending towards the upper substrate (1); the surfaces of the bottom plate (41) and the side plates (42) facing the light-emitting component (3) are reflective surfaces.

3. The OLED light-emitting panel according to claim 2, characterized in that: A reflective layer is evaporated or adsorbed on the surface of the light beam groove (4) facing the light emitting component (3).

4. The OLED light-emitting panel according to claim 3, characterized in that: The reflective layer is a silver film or an aluminum film.

5. The OLED light-emitting panel according to claim 3, characterized in that: The reflective layer is a polyethylene terephthalate (PET) composite film layer, a polyvinyl chloride (PVC) composite film layer or a polymethyl methacrylate (PMMA) composite film layer.

6. The OLED light-emitting panel according to claim 2, characterized in that: The side plates (42) are arranged at both ends of the bottom plate (41), and the side plates (42) and the bottom plate (41) are connected to form a broken line.

7. The OLED light-emitting panel according to claim 2, characterized in that: The light-emitting component (3) comprises a cathode (31), an anode (32) and a light-emitting module (33); the cathode (31) is arranged on a side close to the upper substrate (1); the anode (32) is arranged opposite to the cathode (31); the light-emitting module (33) is arranged between the cathode (31) and the anode (32); and the light-emitting module (33) is used to emit light to all directions.

8. The OLED light emitting panel according to claim 7, characterized in that: The light beam groove (4) is arranged between the light emitting module (33) and the anode (32).

9. The OLED light-emitting panel according to claim 7, characterized in that: Along a direction perpendicular to the upper substrate (1), the upper surface of the side panel (42) is closer to the upper substrate (1) than the upper surface of the light-emitting module (33), or the distance between the upper surface of the side panel (42) and the upper substrate (1) is equal to the distance between the upper surface of the light-emitting module (33) and the upper substrate (1).

10. The OLED light emitting panel according to claim 1, characterized in that: The light beam groove (4) comprises a bottom plate (41), the bottom plate (41) being arranged between the light emitting component (3) and the lower substrate (2), and a reflective material being arranged on a side of the bottom plate (41) facing the light emitting component (3) for reflecting light emitted by the light emitting component (3) towards the lower substrate (2).

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